[Bug]: Radar Altimeter Servo susceptible to burning out due to over voltage.
kbastronomics opened this issue · comments
Discord Username
Sandra
Bug Summary
The Micro servo used to the control the FLAG in the Radar Altimeter is a 2.8-4.2 volt (see spec below)
driving this servo at 5V can cause it to burn out.
Specifications:
Voltage: 2.8V-4.2V
Speed:0.07s / 60 ° 2.8V and 0.05s/60 ° 4.2V
Torque:0.05Kg/2.5V and 0.075Kg/4.2V
Size: 16.3mm x 13.5mm x 6.3mm
Weight: 1.9g
Plug: micro JST 1.00 pitch
Expected Results
The servo should be driven within its specified range of 2.8.4,2 volts
Actual Results
in talking with Ben-F111 he has reported that he's blown multiple servos due to over voltage.
We should like the voltage going to the servo. this is both at the +V pin and the PWM pin.
Screenshots/Images/Files
Applicable Part Numbers
HK-5320 - SERVO, DIGITAL, ULTRA-MICRO, 1.7g
Release Version
v0.2.0
Category
Electrical (PCBs/Wiring/etc)
Applicable End Item(s)
Right Console (RCON)
Built to print?
- I built (or attempted to build) the part to the OpenHornet print without any deviations.
- I am not building this part to the OH print. (List deviations in detail in the Miscellaneous Info text area below.)
Miscellaneous Info
No response
@kbastronomics Do we have a PN for the PCB side micro JST connector?
A quick look is that there are 1mm spacing JST connectors, but micro JST is 1.25mm spacing. So need a little clarification.
Updated the circuit to the following:
Looks like a Micro JST with 1.25mm spacing.
Need to flip pinout; didn't realize pinout in datasheet was viewed from below the PCB.